The central idea in an introductory paragraph is also known as the topic sentence
the thesis
the example
the transition

i think the beatles

explanation: they are talked about more.

the correct answer is c. he speculates on what might happen at given points in the future in a world without people. alan h. weisman is an american author, professor, and journalist. authors organize their information with a purpose. they present their ideas in an organized way. this is called text structure. weisman uses text structure so as to improve overall comprehension and to prove his points.